xcode 将 NSData 转换为字节数组
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Convert NSData to byte array
提问by Radix
I want to convert the NSData into byte array and given below is the code that i have used
我想将 NSData 转换为字节数组，下面给出的是我使用的代码
NSData *imageData = UIImagePNGRepresentation(recipeImage.image);
NSUInteger len = [imageData length];
Byte *byteData = (Byte*)malloc(len);
memcpy(byteData, [imageData bytes], len);
NSLog(@"%8s",byteData);
But its giving me an error when i post the byteData to the webservice which is given below
但是当我将 byteData 发布到下面给出的网络服务时，它给了我一个错误
"Server was unable to process request. ---> Parameter is not valid."
“服务器无法处理请求。---> 参数无效。”
and when i print the byteData this is what i get in the console
当我打印 byteData 这就是我在控制台中得到的
aPNG
I tried searching the docs for NSData and found the getBytes method but that too was not of any use i was still getting the same error.
我尝试在文档中搜索 NSData 并找到了 getBytes 方法，但这也没有任何用处，我仍然遇到相同的错误。
Could you please let me know from the code above as in where i am wrong or what mistake i am making in converting the data into byte array
您能否从上面的代码中让我知道我错在哪里或者我在将数据转换为字节数组时犯了什么错误
Edit: I have tried using the
编辑：我试过使用
[imageData getBytes:&byteData length:length];
Its giving me a bad access error
它给了我一个错误的访问错误
回答by Parag Bafna
Try this
尝试这个
NSData *imageData = UIImagePNGRepresentation(recipeImage.image);
NSUInteger len = [imageData length];
Byte *byteData= (Byte*)malloc(len);
[imageData getBytes:byteData length:len];
回答by gnasher729
Your problem is somewhere totally different.
你的问题在某个地方完全不同。
You are sending data to a web service, and that fails. Show us how you send the data to the web service. Converting NSData to a byte array is absolutely pointless. imageData.bytes is as good a byte array as you are ever going to get.
您正在向 Web 服务发送数据，但失败了。向我们展示您如何将数据发送到网络服务。将 NSData 转换为字节数组是绝对没有意义的。imageData.bytes 是一个和你将要得到的一样好的字节数组。
